When are observational studies as credible as randomised trials? (Q80122032)
scientific article published on 01 May 2004
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Current Data About When are observational studies as credible as randomised trials?
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other details
description scientific article published on 01 May 2004

External Links
(P356) 10.1016/S0140-6736(04)16261-2
(P698) 15158638